Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024 USD ($) Segment	Dec. 31, 2023 USD ($)
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 0	$ 0
Amortization period description	The amortization period begins with the first month of availability on our service.
Number of reporting unit | Segment	1
Impairment of goodwill	$ 0	0
Impairment of long-lived assets	0	0
Deferred revenue	19,268,000	15,861,000
Revenues	4,000,000	2,700,000
Marketing and advertising costs	$ 38,100,000	33,100,000
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Dec. 31, 2024
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate202307Member
Defined Contribution Plan 401 (k) [Member]
Significant Accounting Policies [Line Items]
Defined contribution plan annual matching contribution amount	$ 300,000	$ 200,000
Revenue | Customer Concentration Risk | One Third-Party Platform Partner [Member]
Significant Accounting Policies [Line Items]
Concentration of risk	19.00%	15.00%
Accounts Receivable | Customer Concentration Risk | One Third-Party Platform Partner [Member]
Significant Accounting Policies [Line Items]
Concentration of risk	61.00%	51.00%
Accounts Receivable | Customer Concentration Risk | Partner Two [Member]
Significant Accounting Policies [Line Items]
Concentration of risk	21.00%	26.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
License period or estimated useful life of media library	12 months
Voting interests, percentage	20.00%
Maximum [Member]
Significant Accounting Policies [Line Items]
License period or estimated useful life of media library	90 months